Calenders



c. A. M. FOUILLEMT May 9, 1961 ERS 4 Sheets-Sheet 1 Original FiledJuly.14, 1955 IN VEN TOR.

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CALENDERS Original Filed July 14, 1955 4 Sheets-Sheet 2 m; TmkraINVENTOR. .MmEz fad/Ll 67' L m y T Z /K/M r l Arron/er CALENDERSOriginal Filed July 14, 1955 4 Sheets-Sheet 5 ,J CLA E AUGUSTE INVENTOR.

C. A. M. FOUILLET CALENDERS May 9, 1 961 Original Filed July 14, 1955 4Sheets-Sheet 4 mw N WW M E n ma w.

United States Patent M CALENDERS Claude Auguste Marcel Fouillet, Puebla212, Mexico City, Mexico, assignor to Productos Mexalit, S.A., Sta.Clara, Edo. de Mexico, a corporation of Mexico Continuation ofapplication Ser. No. 522,030, July 14, 1 55. This application July 18,1957, Ser. No. 672,749

1 Claim. (Cl. 25-30) This invention relates to improved mechanicalcalenders for the manufacture of asbestos-cement coated pipe or thelike. This application is a continuation of my co-pending applicationSerial No. 522,030, filed July 14, i955, now abandoned.

It is an object of the present invention to provide means for obtainingthe highest amount of compression when applying the wet mixture ofasbestos-cement during the calendering process and therefore means for0btaining a better exterior finish of calendered pipes.

It is another object of the invention to reduce the time required tomanufacture calendered pipes.

It is a further object of the present invention to provide means formaintaining adjustable equidistant parallelism of three rollers disposed120 degrees from each other at all times.

It is a further object of the present invention to provide hydraulicpiston pressure to one of the rollers known as the compression rollerand which is a means of effectively forcing out the liquid part of thewet asbestos cement mixture.

It is another object of the present invention to provide damping meansto absorb the shock when the compression roller is rammed towards thecentral cylindrical sleeve upon which a layer of asbestos cement is tobe calendered.

It is a further object of the present invention to provide screw andcounterbalanced chain means to two roller's known as reaction rollersand thus assure calibrated movement of each reaction roller away ortowards each other with respect to a plane equidistant from each rollerat all times.

It is a still further object to provide guiding rods at each end of thecompression roller to maintain parallel alignment when the rolleradvances towards the central sleeve upon which a layer of stock is to becalendered to form a pipe.

Another object of the present invention is to provide damping means tothe central idler sleeve to any shock from the two reaction rollers andthe compression roller and also prevent disequilibrium of pressure fromthe three rollers.

For other objects and a better understanding of the invention, referencemay be had to the following detailed description taken in connectionwith the accompanying drawing, in which:

Figure 1 is an end elevational view taken of the left side end of thepipe calendering machine;

Fig. 2 is a fragmentary vertical cross sectional view taken through oneof the two hydraulic cylinders which actuates the compression roller andas viewed on line 2-2 of Fig. 4;

Fig. 3 is a front elevational view of the pipe calendering machine withthe compression roller broken away to look upon the pipe being formed;

Fig. 4 is a top plan view of the pipe calendering machine;

2,983,020 Patented May 9, 1961 Fig. 5 is an end elevational view takenof the right side end of the pipe calendering machine;

Fig. 6 is an enlarged horizontal sectional fragmentary view taken online 66 of Fig. 7;

Fig. 7 is a fragmentary vertical sectional view taken on line 7-7 ofFig. 4.

Referring now to the drawings, a detail description will be made. Thispipe calendering machine comprises a bed frame 1 which has bearingblocks or support frames 2 that are adjustably slidable fore and aftatop the respective bed frames 1 and guided by parallel tongue andgroove guideways 3 in the surface of frame 2.

Each of the bearing blocks or frames 2 holds a twoway fluid cylinderdevice 4 in which rides piston 5 which is integral with piston rod 6,Fig. 2. Said piston rod 6 is directly coupled to another slidable frameblock 7 which is slidable upon the block or frame 2. Pressurizedhydraulic fluid is used to move piston 5 in controlled directions byintroducing hydraulic fluid in either ports 10 or 11. Frame 7 supportsjournal 12 of compression roller 9 in bearing 8 which is integral withthe frame 7. The upper frames 7 on either end of compression roller 9are connected together to work in unison through a laterally extendingstabilizer device 13 having a moving pivot 14, a stationary pivot point15 is journalled in frames 2 and a pivot connection 16 with upperslidable frame 7. The device generally comprises stabilizer shaft 15',end arms 14 and links 16'. The device 13 maintains parallel movement ofthe frames 7 and the alignment of compression roller 9 with otherrollers to be mentioned.

In one frame 7 there is a bored hole 17 into which rod 18 is introduced,Fig. 5. Spring 20 between frame 2 and stop 19 of rod 18 acts to cushionthe shock when rods 6 are activated rapidly in a forward direction tomove the above-mentioned compression roller 9. The other end of springloaded rod 18 makes contact with a bored pocket 21 of mandrel supports22.

The frame .22 is slidable atop the bed frame 1, Fig. 5. Forked journalbearing 24 is pivotally connected by an offset pivot pin connection 23upon upper end of the frame 22. A spring 26 between forked bearing 24and slidable frame 22 absorbs any shock or unequal stresses borne by amandril 25 that carries a perforated work or pipe sleeve 27. The pipesleeve 27 makes contact with compression roller 9 and reaction rollers28 and 29. On the lefthand side of the machine, as shown in Fig. 1, mandril 25 is dropped into and supported by forked bearing frame 30. Base33 of the frame 30 is slidable atop bracket 32 secured to bed frame 1.

Referring to Fig. 4, it will be seen that mandril 25 is hollow exceptfor being plugged at the extreme right end. Mandril 25 is terminated atits extreme left end by an annular airtight swivel joint 36 that iscoupled with flanged pipe fitting 37. Fitting 37 is thus kept fromrevolving about the longitudinal axis of mandril 25 when the mandril 25is made to revolve during the calendering process. A suction pump, notshown, will be connected to the flanged fitting 37 and serves to drawthe excess water from the wet asbestos cement mixture 38 from whichasbestos cement pipes are manufactured by a calendering process. Theperforated work sleeve 27 may have varying outside diameters to suit thesize pipe to be manufactured and is slipped over the hollow mandril 25.Wet asbestos-cement mixture 38 is introduced from above along the bightbetween compression roller 9 and perforated sleeve 27. As willhereinafter he more fully described, the sleeve 27 and mandril 25 aremade to turn about their central longitudinal axes and a layer of cement38 of desired thickness is formed on the exterior cylindrical surface ofwork sleeve 27 to form a coated pipe 39. Revolving compression roller 9under hydraulic pressure firmly presses pipe wall 39 -.offthe roller and"which is vertically adjustable;

andservesto sqiieeieout the excess water from the wet cement 38. At thesame time, water issuckedfrom within through perforations 34 of sleeve27 and through annular passage between thewall of said sleeve 27 andthe'w'all of hollow 'm'andril the suction further 'continued throughapertures" in the leffen'd'of the mandril; Fig. 4, and into thesuction"pump"connecte'd to'the flanged fitting 37. Therefore, means areprovided to expedite 'the time required to manufacture a pipe because ofthis rapid drying out process.

The reaction rollers 28 and 29h'ave .sh'allow spiral ribs 'on theirexterior cylindrical surfaces'which provide means for'compacting thecement 38upon thefpipe 39 while 'drying of the cement is being done:-Revolving. rollers" 28 and 29 also cause sleeve 27.'to' revolve which inturn causes roller 9 to revolve. Pa'rallel'longitudinal axes'of rollers9, 28 and 29 are'always disposedat- 120 degree anglesfrom longitudinal'axis' of sleeve 27 and this jrelationsh'ip is maintained withany sizesleeve 27' which is to be coated. 'Reaction roller 29 has a journal 40'which'is held by joilrnal' bearing frame hangers 47, one -at each end oftheroller and which are vertically" adjustable. The journalbearing'frames 47 are guided and retained vertically by riser members 49"on either side'of the'machine, Fig. 5. The roller 29 "has a pulley 41secured to its journal 40"on the'right'side of the' m achine. Reactionroller 28 has a journal 46'iv1iiehf'is' he ldby, journal bearing framesor ha'ngersi48fone at :eaaagna TI-he jobrnal bearing frame 48'is guidedand retained"verti cally"byriser member 49 on each side of the machine.Theroller'28 has apixlley .43'sec'ured to its journal 46 on the rightside of the machine. A-system' of idler pulleys 44 is also provided onthe rightside of the ma- 3 chine and belt 42 connects all'pulleys fordriving the reaction rollers '28and 29. Driving pulley 45 drives thebelt pulley system through driving shaft 60 which in turn'is driven 'bymotor 61L Each 'of the frames or hangers 47-fand '48 have integrallyconnected, rearwardly extending extensions 51'or 52 havingverticallythreaded holes thereinand they are disposedwithin rearward supports 50ofthe machine and atop bed frames 1,the extension 51 having a right handthreaded hole and extension 52 having a left hand threaded hole. Wormpinion 58 driven byshaft 59 drives horizontally disposed worm wheel gear56 which in'turn drives threaded shaft53 and. thrust bearing-57isfprovided" between worm gear 56 and the vertically disposed threadedshaft 53, Figs. 5, 6, and 7. Shaft '53 ha's'a righthand'threaded portionand a left hand threaded portion 54, mating'with the above mentionedextensions 51 and 52. Shaft 59 which drives Worm pinion 58 is driven bypulley 66, Figs. 3 and 4, which is made to turn in either direction beltdriven by pulley 67 driven by motor 68. Worm pinion 58 driven in onedirection causes rollers 28 and 29 to travel away from each'other incalibrated fashion and their longitudinal axes will always remain at anangle of degrees to the longitudinal axis of varying size sleeve 27 fromwhich cement coated pipe 39 is fabricated.

The weight of the hangers 47 and 48 are counterbalanced by a chain andsprocket" arrangement, Fig. 1 Sprocket 63 carried by shaft 62 on eitherside of the machine suspends chain 64 from above. The chain 64 isattached to each hanger 47 and 48 and extends therebetween. Verticalmovement of hanger 47 in one direction is complemented byequ'alrn'ovement of hanger 48 in the opposite direction,'and chain 64 remainstaut to effectively carry the weight of each hanger,

Whilevarious changes maybe madein the detail con: struction, it shall beunderstood that such changes shall be within the spirit and scope of thepresent invention asdefined by the appended claim.

What is claimed is: n

An asbestos cement pipe calendering machine comprising a bed framehaving laterally spaced parallel guideways, fluid cylinder supportframes respectively adjustably fixed to the guideways of the bed frame,mandrel support frames respectively mounted on the bed frame 0rearwardly of the respective fluid cylindrical support frames for freefore and aft sliding movement, rear supports extending upwardly from thetop ofthe bed frame, vertically spaced reaction rollers carried upon therearsupports, means for driving said rollers, a mandrel adapted todetachably support pipe sleeves'to be calendere'd with asbestos cement,said mandrel supports respectively having journal bearings-forsupporting theends of the mandrel, said mandrel bearings being pivot--ally hinged upon the mandrel "supports rearwardly of their hearing axesfor pivot up and down movement with respectto the supports,.biasingmeans supporting the forward-ends of the mandrel "bearings andforwardly of-their axes-to absorb-shoclcand unequal stress borne bythemandrel, compression roller bearing' blocks re 5 spectively carriedupon the respective fluid cylindrical supportframes for-fore and aftsliding movement with respect thereto, an idlercompression rollerforwardly spaced-from therear driverollers journalled inthe roller frameblocks, fluid cylindrical devices respectively carried .by their supportframes and operable to shift the rollenbearing blocks and thecompressionroller toward or away from the pipe sleeve carried by themandrel and cushion rod means extending between the compression rollerbearing blocks and the mandrel supports to cushion the shock of thecompression roller when thrust toward the pipesleeye and the mandrel bythe fluid cylindrical devices -and to-urgea the mandrel supports and themandrel with the pipe sleeve toward the rear drive rollers.

References Cited in the file of this patent UNITED STATES PATENTS2,022,009 Rocca Nov. 26, 1935" 2,1l3,096 Rocca Apr. 5, 1938 2,373,672Ferla Apr. 17, 1945 2,778,285 Pasquale Ian. 22, 1957 FOREIGN PATENTS769,337 France June 5, 1934 780,093 France Jan. 24, 1935 620,619 GermanyOct.'24, 1935 516,678 Great Britain Jan. 9,1940

